ict22 lec1
- 1. The Internet
- 2. What is the Internet? The Internet is a global network of computers communicating under one set of guidelines, formally called Transmission Control Protocol/Internet Protocol (TCP/IP).
- 3. The Internet The Internet is more than a physical network of wires linking individual computers to one another. It is also a network of people and information resources.
- 4. Basic Configuration of 2 PC’s Communicating via Internet
- 5. The Internet is not a specific place, company, or service, although places, companies and services are accessible via the Internet. Nobody owns the Internet.
- 6. How do you connect to the Internet? Basically you will need: a personal computer a modem and a telephone line an Internet Service Provider (provides the software, the IP address, and the link to the Internet) a network card if connecting to home or office network
- 7. What can you do on the Internet? World Wide Web Electronic Mail FTP Talk/Chat Online information resources Others
- 8. The World Wide Web The World Wide Web is the collective name for all the computer files in the world that are : accessible through the Internet located on and provided by a large number of Web servers electronically linked together, made possible by HyperText Transfer Protocol (HTTP) and HyperText Markup Language (HTML),; viewed, experienced or retrieved through a “browser” program running on your computer
- 9. The Web components Web browsers and servers - Web browsers are application software used to access files or applications which are located and run by Web servers. Web contents - files in several formats text, multimedia, video, audio, etc...that are available through the World Wide Web HTTP and HTML - HTTP is the protocol used in World Wide Web to transfer files from one computer to another while HTML is used to format and display Web pages containing
- 10. Websites A website is one or more web pages that relate to a common theme, such as a person, business, organization, or a subject, such as sports. The first page is called the home page , which acts like an index, indicating the content on the site. From the home page, you can click hyperlinks to access other web pages.
- 11. Web browsers and servers 2 . Browser interprets user’s selection and makes request from appropriate server. 3. Server accepts and processes request from browser. 4. Server sends requested files to browser to be interpreted . 1. User sends request 5. User receives file Browser
- 12. Examples of browsers Netscape Navigator Microsoft Internet Explorer Opera Neoplanet Mozilla Firefox More…
- 15. Web Content Text Sound Images Video Animation Full-text Statistical data Abstracts/Indexes Software Library catalogs News And more
- 16. HTTP and HTML Web servers and browsers use HyperText Transfer Protocol (HTTP), an Internet-standard protocol, to handle the transfer of text and other files between different computers. HTTP “defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.” HTML defines how Web pages are formatted and displayed by web browsers
- 17. Hyperlinks between Web resources Hyperlinks are special HTML codes included in Web pages that connect Web resources, instruct the browser to fetch a resource, run an application or jump to another site. Hyperlinks consist of the following: HTML tags - instruct Web browser and Web servers what file to get or what program to run, includes URL’s and/or pointers to applications and files to run Anchor – text or image used to place a hyperlink, the clickable object that activates the hyperlink Uniform Resource Locators (URL) – address of the Web resources
- 18. Sample URL’s http://lcweb.loc.gov http://www.ifla.org http://www.uslt.edu.ph http://library.albany.edu/internet/ http://www.levelupgames.ph http://Joel.p2galan.com/ http://www.baliuag.florida.com/
- 19. Electronic Mail (e-mail) Uses: exchange correspondence transfer documents subscribe to news services get computer software Format: [email protected] example: [email protected]
- 20. Transferring files from one computer to another The File Transfer Protocol (ftp) allows you to copy a file from a remote computer to your desktop and vice versa Syntax: ftp <ftp.sunsite.edu> Logging in username password
- 21. Real-time communication using the Internet Talk / ytalk talk <user address> IRC - Internet Relay Chat irc <nickname> <irc server> Yahoo messenger, MSN,ICQ, etc.
- 22. What are online information resources? Locally available databases: library catalogs, abstracts and indexes, full-text, multimedia Directly available from hosts: abstracts and indexes, full-text, multimedia Available via the Internet:abstracts, indexes, e-journals and other full text documents, multimedia
- 23. Online information resources Multimedia Abstracts and Indexes Full-text documents Music Video Sound
- 24. Future of Internet Internet2 - is a not a single network, but a consortium of hundreds of high-speed networks linked by fiber optic backbones that span the United States and links to other countries. The network transmits data at speeds up to 2.4 gigabits per second--45,000 times faster than a 56 Kbps modem
- 25. Internet 2 The next-generation network went online in February, 1999, linking a number of universities around the world. It should be available for commercial use soon. Then get ready for 21st century services like interactive television, virtual 3-D videoconferencing, and much more
- 26. A new kind of Web While PCs were once the primary means of accessing the Internet, we're now seeing Internet-enabled devices such as PDAs and cell phones that send and receive e-mail and access the Web. Soon, everything from your car to your refrigerator will be connected to the global network, communicating with each other wirelessly.
- 27. URL for media clips Dabble.com Blinkx.tv Youtube.com Myspace.com Google video Worldtv.com Eyespot.com
Editor's Notes
- #2: To the trainer: This lesson should enable the trainees to use the Internet with competence and to teach others how to use it. Lead them to useful sites. There are no further notes for the trainer.